At 08:56 09/09/2003 Tuesday, Winship wrote:
 >On Tue, 9 Sep 2003, Jack Schmidt wrote:
 >> Hi! Is it possible to prevent members of a list from setting the mail
header
 >> type?
 >
 >Not that I know of.  They are able to change the header to set what works
 >best with *their* systems.  Why does the listowner want "one size fits
 >all"?

Good Question.

I don't know if this will answer the original question though i.e., I
haven't tried it (and there may be a difference in processing among
LISTSERV releases):

have a sub-list where the subscriber is joined, but mail to a "super"
list (with the desired options) that references the sub-list

/Pete